51906684826 has 8 divisors (see below), whose sum is σ = 77971099284. Its totient is φ = 25916318400.

The previous prime is 51906684773. The next prime is 51906684829. The reversal of 51906684826 is 62848660915.

It can be written as a sum of positive squares in 2 ways, for example, as 51895118025 + 11566801 = 227805^2 + 3401^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (51906684829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18510255 + ... + 18513058.

Almost surely, 2^51906684826 is an apocalyptic number.

51906684826 is a deficient number, since it is larger than the sum of its proper divisors (26064414458).

51906684826 is a wasteful number, since it uses less digits than its factorization.

51906684826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37024016.

The product of its (nonzero) digits is 4976640, while the sum is 55.

The spelling of 51906684826 in words is "fifty-one billion, nine hundred six million, six hundred eighty-four thousand, eight hundred twenty-six".